How to use the datacite.errors function in datacite

def test_datacite_register_fail(mocker, app, db, es, minimal_record):
    # Make the datacite API unavailable
    dc_mock = mocker.patch(
        'invenio_pidstore.providers.datacite.DataCiteMDSClient')
    dc_mock().metadata_post.side_effect = datacite.errors.HttpError()

    # Create a reserved recid
    record = Record.create(minimal_record)
    record_uuid = record.id
    recid = record['recid']
    recid_pid = PersistentIdentifier.create(
        'recid', recid, status=PIDStatus.RESERVED)

    # Mint the record
    zenodo_record_minter(record_uuid, record)
    record.commit()
    db.session.commit()

    with pytest.raises(datacite.errors.HttpError):
        datacite_register.apply((recid_pid.pid_value, str(record_uuid)))

'invenio_pidstore.providers.datacite.DataCiteMDSClient')
    dc_mock().metadata_post.side_effect = datacite.errors.HttpError()

    # Create a reserved recid
    record = Record.create(minimal_record)
    record_uuid = record.id
    recid = record['recid']
    recid_pid = PersistentIdentifier.create(
        'recid', recid, status=PIDStatus.RESERVED)

    # Mint the record
    zenodo_record_minter(record_uuid, record)
    record.commit()
    db.session.commit()

    with pytest.raises(datacite.errors.HttpError):
        datacite_register.apply((recid_pid.pid_value, str(record_uuid)))

    # Check that the task was retried ("max_retries" + 1) times
    dc_calls = len(dc_mock().metadata_post.mock_calls)
    assert dc_calls == datacite_register.max_retries + 1

Note that retries are done on another thread so only the initial call to
    retry can be tested.
    """
    patched_client = mocker.patch(
        'cd2h_repo_project.modules.doi.tasks.DataCiteMDSClient')()
    patched_retry = mocker.patch(
        'cd2h_repo_project.modules.doi.tasks.register_doi.retry')
    # Because publish() triggers the task, we need to perform some of the steps
    # of publish() without calling publish()
    record = create_record(published=False)
    mint_pids_for_record(record.id, record)
    doi_pid = PersistentIdentifier.get(pid_type='doi', pid_value=record['id'])

    # Test HttpError
    patched_client.metadata_post.side_effect = datacite.errors.HttpError()

    register_doi(record['id'])

    number_retries = len(patched_retry.mock_calls)
    assert number_retries == 1

    # Test DataCiteError
    patched_client.metadata_post.side_effect = datacite.errors.DataCiteError()

    register_doi(record['id'])

    number_retries = len(patched_retry.mock_calls)
    assert number_retries == 2

# Because publish() triggers the task, we need to perform some of the steps
    # of publish() without calling publish()
    record = create_record(published=False)
    mint_pids_for_record(record.id, record)
    doi_pid = PersistentIdentifier.get(pid_type='doi', pid_value=record['id'])

    # Test HttpError
    patched_client.metadata_post.side_effect = datacite.errors.HttpError()

    register_doi(record['id'])

    number_retries = len(patched_retry.mock_calls)
    assert number_retries == 1

    # Test DataCiteError
    patched_client.metadata_post.side_effect = datacite.errors.DataCiteError()

    register_doi(record['id'])

    number_retries = len(patched_retry.mock_calls)
    assert number_retries == 2